Weft detector for looms



Nov. 1s, 1924.A l 1,515,896

R.G.TURNER wEFT DETECTOR FOR Looms Filed Jan. 5 1923 2 Sheets-Sheet l zoy v Nov, 18, 1924. 1,515,896

. R. G. TURNER WEFT DETECTOR FOR LOOMS Filed Jan. 5. 1923 2 Sheets-Shea! 2 nfumm/mmlmllmml'ummm mi |ill Patented Nov. 178, 1924.

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RICHARD eannnmaar ananas., or woncnsfraza, rarissacnnsnrrs, Assrenon To cnoivrr'roiv axn'ownns Loon wenns, or wcncnsrna, raassaennsarms, a con- PORAIION OF MASSACHUSETTS.

WEET DETECTOR FOR LOOMS.

V.application inea January 5, i923. sei-iai No. 610,747.

TURNER, a citizen of the United States, re-

siding at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful l/Veft Detector for Looms, of which the following is a specication.

This invention relates to weft detecting mechanism for weft replenishing looms, and more particularly to the type of detectors y shown in Patents #972,7 22 and #1,352,536

granted to Ryon. y

yIn looms of the type referred to in said patents a floating actuator lever moves up and down in a slot and a controller pin normally under and in the path of the actuator f plenishing mechanism follows.

is moved out of the slot when suiiicient yarn for continued weaving is present in the active shuttle, but when the detector indicates substantial exhaustion of weft the controller pin remains in the slot to operate the actua tor lever. Tn detectors of this type the controller pin is so connected with the detector as to move with every detecting but nonindicating movement of the detector. This p motion of the controller is objectionable as it not infrequently cuts` agroove in the actuator lever, vresulting in uncertain action of rthe actuator, and also it. is found that untimely and incomplete setting of the re- Again, the forward motion of the detector is communicated to the controller by a positive connection, and should the detector be set so as to move all the parts thereof forwardly on the indicating` movement, thev controller is moved relatively to the actuator as the latter is called upon to do its work. This also results in undesirable wear of the working parts. Y

An attempt to correct these faults was made in the construction shown in the Compagnon Patent #1,291,415 by having the controller pin normallyout of the path of the actuator, but in that instance the controller pin moved with the detector on detecting but non-indicating beats of the lay, and was also arranged with positive connections to the detector and possessed the fault inherent in such a construction.

My improvements haveas their principal object to overcome these defects by keeping the controller pin stationary and Vout of the path of the actuator onV all detecting but non-indicating beats of the lay, irrespective of the varying motions of the detector.

A further object of the invention is to provide connections between the detector and controller pin which will move the latter into operative relation with the actuator and allow it to remain there without being acted upon positively to move from under the actuator by an excessive movement of the detector.

A still further object of the invention is to provide for withdrawing such a detector at transfer without giving a false indication, even though the detector isfree to operate in a manner that would'ordinarily give such an indication.

My invention further relates to certain arrangements and combinations of parts to be hereinafter described and more particu* larly pointed out in the claims.

A preferred form of my invention is shown in the accompanying drawings, in which- Fig. l is a top plan View of the detector showing my. invention,

F ig. 2 is an end elevation looking in the direction of arrow 2, F ig. l,

Fig. 8 is a vertical section taken along line 3 3 of Fig. l,

Fig. a is a view similar to Fig. l but with certain parts omitted and other parts shown in section,

Figs. 5 and 6 are views similar to Fig. et but showing the parts in different positions, and

Fig. 7 is an enlarged front elevation of the compound levers formingy an important part of my invention.

Referring to the drawings I have shown a stand l() secured to the looinside (not shown) and having a horn l1 slotted as at l2 to receive an actuator lever '18 pivoted at 14e to vertically reciprocating slide l5. fr connector 16 pivotally connected to one end of the actuator lever serves to set the weft replenishing mechanism should a contrcller pin 17 lie under the lever 13 as the slide l5 moves downwardly.

i detector slide 18 is mounted for back Vand forth motion a bed 19 which is mounted onscrew 20`supported by stand 10. Y

. An adjusting screw 21 also carried by the fpshbdrearvvardly 'tovvard the shuttlegy Y A l Reference' to Fig.' i4 vvvill show that slide 18"carries"V tvvo detectors, 'one a Wedgeshaped Y ldetector 28 fixed theretoandfthe other a svvinging.r detector 29'? pivotedther'eto and 29 Y. Y i 32andyrespectlvely. Rod321s" acted havinggayarn-engaging partlSO an arm 31" whichk lies between the ends "of vtwo rods u 'onby mechanism'to be described to open i the free Vend thereof held in engagement With- `r rod"32 by' `means of 'spring 42 .hung between Y ondary lever 43 kis pivotedfto and-floats 0n detector'29gwhile'rod33 serves to close said detector by Venga' ement E Ot'screwv 34 :against Y actionlof spring 27 Alug 35v carriedfby theslide 18 is positionedi'or"engagement bed `'19as theI sli emovesrearwardly under' byla studBGMWhich is carried by the transf ferrer'arm indicatedat87l and moved for; :3.9"

` the-detector out of the'path of Vthe incom- VWardlygat 'thetinie ofvveft transfer to move ing bobbiIn f `All.hemechanism thus arfdescribedis oldfand @for amore complete showing ofthe same referencefr `.may be had` t0 Patents #972,722 and1 V:,tl'rl2,536' previously reterred to. vlnmthese i patents the controller pin `17 `norm'allrylies under 4the actuator lever 13 and is Withdrawn each time'abobbin' with sufficient yarn is presented to the detector.

My improvements inclde'ajprimary lever "'sW`ing/inggaboutffixed pivot 41 andhaving `the`.,primary lever and the stand 10. Aisealver4`0las at 44 andhas one endthereofin engagement Withthe detector slide 18. The

\ other end of thesecondary lever is pivotally connected to the forward-'end o1 the con! ytrollerpin 17 as indicated at 45v Vand is nory mally positionedsfthat the pivots 41 and 45:v are 'in substantial alignment',V :To insure this alignment I place a compression springN 46 armn'dtheV controller pin 17 between the stand 10 andthe secondary lever, the effect oi'iwhichisto hold said lever against a stop.

47"formed on the primary Slever. The pivots are thus kept in' alignment as the levers swing onpivot` 41. lS'pi-ing 46" isl weaker thanspri1ig41and isjust strongfenough toV v jrenrovepin '17' from under theactuator lever'.

Y In'ordr that the rear endof pin 17 may be `adjusted Withrespecttc' the actuator lever 13;'1 arrange the pivot=41 onaf'casting 49r .in:proveniente will be apparent to those Y about. the aligned pivots J41 and 45 Land j the `V .controller pin Will remain at rest in. itsnor:

`having an arm 50 slotted at 51 to receive a bolt 52 threaded into arm 53 projecting forV Wardly from stand 10i The slot affords longitudinal Vadjustment of the controller pin. Y Y 70 A finger 48 projertingfforwardly from the sli-de 18 is positionedto'engage the primary lever atthe timegoftransfer. g 4

From Vthe foregoingthe operation of myV skilled in theart. On normal detecting .beats'fotfthef lay; when sufficient yarn ior continued Weaving is presented to the de.-

" Vtector, the' swinging' detector 29 'Will be ,re

strainedrom angnlar lmotion byn the Vvveft andthe" slide 18' andirod 32 will move' for!V wardrinfjunison Without altering theirfrelai-1y tive position ,f as shown" inj Fiig; 4." Tliis Will move *the 'i primary" andv secondaryrlevers malposition ontioiz jslot112. Howeverg'when f the Vyarn is substantially exhausted'detectorT l 29 Willswing to theposition'fslfowninjilni'g.

by springf42."'This` permits rod i 32 to rt@ 90 main in its lrear position andcause's arel'a tiveinovement othevprimary fandsecondary 'i i levers, the pivot '44 not gbeingmoved as far'ffor 1f ivard'as 'inFig 4f' Tlie'result'of thisaction rontrol'ler. pin under theVv actuatorjlver" lto veffec/t1Wett replenishment. Should 'the' slide i 18 be Y set to I continue moving forward after tlie controllerpin' is underthefactuator lever;V

the primaryjfand secondary VleversvvilljV'move 100 i terwardly in*,thefsafme` relative "ositin' shovvnin Fig. 5 andthe tendency'` o spring 46'to removeftlfecontroller pin" Willjno't be increased and said .pin-'Will' Lremain runder the actuator irrespective' 01E'1 excess motin of` 105 Slide 18.1! i i l Y Atthe-time of transfer "itisfdesirableto Withdraw theudetectory from th`e' path of "the incomingjbobbin" and S also to 'prevent i' sec'- Y ,exhaustion as thedep'letedshuttle arrives un'derth'e refpleni'shing mechanism. Theffyarnengaging; detector 8O'y l will move angularly toy cause a relative motion'of the levers-40f-and 43 'Whe n?" everV the" fslide 18 is moved?orxvardlyand 115 said vdetector BG'is unresisted. VVlieirtheV i t'ransferrer arm descendsfjstd.fwillimove' orvvardly"`and`en'gage lug" to dravvslide 18 avvay` from the shuttle and the `detector 30, notbeing'incontactjWith the yarn, will 120 swing angularly un'derthe` action of rod 32; The result'othis isftojmove rod17funder* actuator 13 but A'as Vthis wouldy result in' a 'false i indication Vitis necessaryjto` provide means to VWithdraw said rod 17. .Accordingly F' tore moved far enough to carry the tree end thereof. away from the iforward upturned end of thefslide 1S and spring 46 acts to withdraw rod 17. This latter action takes place before the actuator 1? starts to more down.

It will -be noticed that. since springs 42 and 46 are in tension and compression, respectively, an adjustment of the casting 49 torwardly will increase the pressure of spring 42 and lessen that oitspring 46, and that the relation of the springs may be readily varied by a simple adjustment.

It will be apparent that I have provided a simple weft detecting mechanism wherein the controller pin is normally at rest on all non-indicating detecting beats of the lay irrespertive of the motion ot the detector; that the controller pin, after moving under the actuator, is not acted upon by additional torce to move with respect to the actuator should the detector motion be excessive; that at transfer the control of the primary lever which determines the position of the controller pin shifts from the detector to the de- Y tector slide to keep the controller pin at rest;

and that the springs acting to place the controller pin are so related that by a single adjustment the pressure of one may be strengthened as the pressure of the other is weakened.

Having thus described my invention, it will be evident that changes and modifications can be made therein b-y those skilled in the art without departing from the spirit and scope ot my invention as set Jforth in the claims, and I do not wish to be otherwise limited to the details herein disclosed, but what I claim isl. In a weft detector for weft replenishing looms, an actuator for the replenishing mechanism, a controller for said actuator, a detector subject to varying, movements under influence of the shuttle, and connections eX- tending between the detector and controller, said connections including a pair of levers pivoted together one of which levers moves about a iXed pivot and the other of said levers being connected to said controller, the levers being movable by said detector.

2. In a wett detector tor wett replenishing mechanism, an actuator for the replenishing mechanism, a controller for said actuator, a detector comprising two relatively movable parts, a pair of levers pivoted together, one to be engaged by each ot' said parts of the detector, a fixed pivot for one of said levers, and connections between said controller and the other of said levers.

3. In a weft detector for weft replenishing mechanism, an actuator for said mechanism, a controller for said actuator, a detector having two relatively movable parts, a primary lever having a fixed pivot and engaging one of said detector parts, a secondary lever pivoted to the primary lever and engagngthe other part of said detector, and connections between the controller and said secondary lever.

In a weft detector for weft replenishing mechanism, an actuator for said mechanism, a controller for said-actuator, a detector having two relativel 1 movable parts, a primary lever having a fixed pivot and engaging one of said detector parts, a secondary lever pivoted to the primary lever and engaging the other part of said detector, and connections between the controller and said secondary lever, the connection between the controller and secondary lever being normally in alignment with said liXed pivot for the primary lever.

5. In a wett detector for wett replenishing mechanism, an actuator for the mechanism, a controller for said actuator, a detector having two relatively movable parts, a primary lever movable abo-ut a fixed pivot and engaging one of said detector parts, a secondary lever pivoted to the primary lever and engaging the other of said detector parts, means to cause relative movement of the detector parts at substantial weft eX- haustion to move said controller into operative relation with respect to the actuator, said means permitting continued motion of the primary lever without moving the controller.

6. In a wett detector for weft replenishing mechanism, an actuator for said mechanism, a controller for said actuator, a detector comprising two relatively movable parts, a lever movable about a fixed pivot and engaging one of the detector parts, means carried by the lever to engage the other detector part and move said controller into operative relation with the actuator when the detector parts move otherwise than in unison, and means acting at transter of weft to give said detector an excessiveieorward movement, said means establishing engagement between the lever and that part of the detector with which it is normally out ot contact. I

7. In a weft detector for weft replenishing mechanism comprising a stand, an actuator for said mechanism, a controller for the actuator, a detector having twoy relatively movable parts, a pair of levers pivoted together, one engaging each part of the detector, an adjustable pivot for one of said levers, a connection between the other lever and the controller, resilient tension means between one of said levers and the stand, and resilient compression means weaker than said tension means between the other ot said levers and said stand.

8. In a wett detector tor looms, an actuator to eli'ect a change in the operation 0f the leoni. a wett detector, means to adjust the position of the wett detector toward and lll) `amd meffmfs' interposed between' 'thev detector Y f-hd @he'cohtroller effective to move said controller nto `operative positoni vthy respeetto the actuator' atfthe' beginning ofy an indicat-A ingmoveme'tlof the detector in' vwha'nevel' 10L y' adjusted position the :detector 'may occupy. Y

In testimony whereof I'haverheelmtowaf- Iixed my 4si gnature.

MoH-ARD GREENLEAFTURNER. f 

